Coal-washing machinery



S. STUT'Z. Coal-Washing Machinery.

No. 226,940.- Patented 'April 27:,1880.

ITNE SES 11v VENTOR N. PETERS; PHOYO-LIITHOGRAPHER, WASHINGTON, D. U.

U ITED STATES PATENT Danica.

SEBASTIAN STUIZ, OF PITTSBURG, PENNSYLVANIA.

COAL-WASHING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 226,940, dated April27, 1880.

Application filed February 3, 1880.

To all whom it may concern:

Be it known that I, SEBASTIAN STUTZ, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Goal-Tashing Machinery; and I do hereby declarethe following to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming part of thisspecification, in which Figure l is a side elevation, and Fig. 3 a frontelevation, showing the yoke, a portion of the piston-rod, theconnecting-coupling, and the rotating lifting-cam. Fig. 2 is a verticalsectional view, showing the construction and arrangement of the pistonand the co-opcrating parts. Fig. 4 is a transverse sectional view takenon the line 00 m, Fig. 2; and Fig. 5 is a similar view taken on the liney y of the same figure.

Similar letters of reference in the several figures denote the sameparts.

This invention relates to that class of coalwashing machines for whichLetters Patent of the United States N 0. 188,691 were granted and issuedto me March 20, 1877; and it con sists, primarily, in the combination ofa liftingcam with a lifting-yoke and a piston-rod, adjust-ably connectedto each other, and with a buffer or stop for limiting the downwardstroke of the piston, whereby the length of the stroke of the piston maybe regulated.

It further consists in effecting the adjustable connection betweentheabove-mentioned lifting-yoke and piston-rod by means of a coup lingswiveled to the said yoke and connected to the piston-rod by anadjustable screw-connection; and it consists, finally,in the employmentof a hand-wheel attached to the shank of the said coupling forfacilitating the adj ustment of the coupling.

In the drawings, A represents the piston box of a coal -washing machinesuch as is shown in my patent referred to; B, the piston which works insaid box; 0, the piston-rod; D, the yoke connected to the piston-rod; E,the rotating differential cam which co-operates with the yoke to liftthe piston F, the upper guide for the piston-rod; a, the opening throughwhich the water beneath the piston is forced by the descent of thelatter into the separating-chamber of the machine, and b the openingthrough which a supply of clean water is admitted below the piston whilethe latter is ascending.

The yoke D is adjust-ably connected to the piston-rod by means of acoupling, G, consis ing of an upper shank, y, and alower tubu= larscrew-threaded portion, g. The shank g is made square or polygonallyshaped in crosssection at its base to accommodate and hold a hand-wheel,H, and it extends up through the lower tubular portion, (1, of the yoke,and is confined therein by a nut, it, thus making a swivel-connection,which prevents the withdrawal of the shank but does not interfere withits rotation. The lower tubular screwthreaded portion, g, is adapted to'receive the screw-threaded end I) of the piston-rod. By turning thehand-wheel H the piston and yoke can be adjusted nearer to or fartherfrom each other, to make the stroke of the piston on the water beneathshorter or longer, as desired.

I preferably locate a buffer, M, at the bottom of the piston chamber orbox for the purpose of arresting the'descent of the piston, and therebyrelieving the cam-shaft from the shock or strain to which it wouldotherwise be subjected. As the buffer limits the downward stroke of thepiston, it is evident that by turning the hand-wheel H the yoke D can beadjusted so that the whole or but a portion of the surface of the camwill operate to raise the yoke and the connected piston. When the yokeis adjusted down near to the camshaft the whole of the cam-surface willoperate to raise the yoke and the stroke of the piston will be of themaximum length. As the yoke is adjusted farther away from the cam-shaft,a portion only of the cam will come in contact with it, and the strokewill be correspondingly shortened. The yoke may, in fact, be adjusted sofar away that the cam will not strike it at all. This regulation of thestroke of the piston is a marked improvement and adds materially to theeffectiveness of the machine.

Instead of permitting the lifting-cam to work against the smooth innersurface of the upper part of the yoke, as heretofore, I now employ afriction roller or sleeve, f, mounted upon a cross-pin, f, and therebyavoid a great deal of friction and reduce the Wear.

The piston proper is constructed of a metal plate, I, preferably formedin one piece, and having two vertical parallel flanges, i t, ex-

tending way around its four sides. Between the flanges are insertedboards J, which constitute the sides of the piston, and screws or boltsj are applied through the inner flange, i to hold such boards securelyin position.

When the machine is in operation the piston is lifted by the rotatingcam, and suddenly descends of its own weight, falling sharply on thewater beneath and forcing the latter or a portion of it into-theseparating-chamber of the machine through the opening a. The ex tent ofthe stroke is limited by the buffer M. As the piston again rises freshwater is supplied through the opening b, and the operation is repeated,as before.

I claim as my invention 1. In a coal-washing machine, the comblna,

tion of a lifting-cam with a lifting-yoke and a piston-rod, adj ustabl yconnected to each other, and with a buffer or stop for limiting thedownward stroke of the piston, whereby the length of the stroke of thepiston may be regulated,

substantially as described, for the purpose specified.

2. In a coal-washing machine, the combination of a lifting-cam, alifting-yoke, and a piston-rod with a coupling swiveled to the yoke andconnected to the piston-rod by an adjust able screw-connection, and witha buffer for limiting the downward stroke of the piston, whereby thelength of the latters stroke is regulated, substantially as described.

3. In a coal-washing machine, the combination, with the lifting-cam, thepiston-rod, and the yoke, of the coupling G, having the shank g,carrying the hand-wheel H, and connected to the yoke,-as described, andhaving the screwthreaded lower portion, 9, for the accommodation of thescrewthreaded piston-rod, substantially as described.

Witnesses M. CHURCH, W. BLAGKSTOOK.

